CVE-2026-70599

Electron: Permission Check Handler Receives Main Frame Origin Instead of Requesting Iframe Origin

State: Published
Severity: 5.9 Medium
Published: Aug 5, 2026
Updated: Aug 5, 2026
Reserved: Aug 4, 2026

Description

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.7, 40.9.0, 41.2.0, and 42.0.0-beta.1, serial-port and media permission checks made from an iframe passed the top-level frame origin to session.setPermissionCheckHandler instead of the requesting iframe origin. Origin-based handler logic could grant a cross-origin iframe device access intended only for the top-level origin. This issue is fixed in 39.8.7, 40.9.0, 41.2.0, and 42.0.0-beta.1.

Scores

CVSS	Score	Vector	Source
3.1	5.9 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N	GitHub_M

Weaknesses

CWE-346 Origin Validation Error

Affected Products

Product	Versions
electronelectron	< 39.8.7Affected >= 40.0.0-alpha.1, < 40.9.0Affected >= 41.0.0-alpha.1, < 41.2.0Affected >= 42.0.0-alpha.1, < 42.0.0-beta.1Affected

References

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